1) it means someone turned the switch from run to off , what’s difficult to understand? And both the switches didn’t move to off simultaneously, it moves to off one after the other, clearly indicating it didn’t happen automatically.
All your other points are tinfoil conspiracy theories. The same FAA who issued the 2018 notice, has now told “although the fuel control switch design, including the locking feature, is similar on various Boeing airplane models, the FAA does not consider this issue to be an unsafe condition that would warrant an Airworthiness Directive on any Boeing airplane models, including the Model 787." Also, all major airlines are checking their fuel switches just to be safe, no one is trusting Boeing blindly.
Please read more, and don’t just skim the headlines. Also, pls don’t open your mouth during your team lunch, your team may finally understand you are a brain dead Sangh and your job may be in trouble.